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What power requirements are necessary for the 441 lock-in amplifier?

April 26, 2017amplifier Lock-in necessary power requirements

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What power requirements are necessary for the 441 lock-in amplifier?

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10 Posted

+/-15V and ground are required. The +5V input can be simply powered off of the +15V line using a 78L05 regulator. The +5V line uses very little power, and so places little load on the +15V line; the overall figure is still below 50mA. Typical actual loads on the +/-15V lines in this configuration are 30 to 40mA. Any power adapter with good ripple performance will do. The 441 will also operate satisfactorily from +/-12V, but the dynamic reserve will be reduced slightly due to the reduced headroom.